Ive had five neons in my tank for quite a while. I woke up one morining to find that one of them was swimming ver irratically. He was swimming upsidedown and in circles...30mins later he was dead. All of the other neons are fine and the water quality is ok. None of the other fish have been bothering the neons although the neons to tend to fight with each other quite a lot.
Any ideas as to what caused his death??
Any ideas as to what caused his death??